Is anyone else having issues uploading an archive to App Store Connect? I went to validate an archive of my app, and seems to hang during validation. I've tried just validating the app, and tried Transporter as well. It hangs on the analyzing app. How to troubleshoot?

I'm writing an app using the latest Xcode 26 beta, and I'm finding an issue with dark mode and Date and time pickers. Basically, when I preview a view using the canvas in Xcode, it works as expected, however, when I build and run the app in a simulator or on my phone, dark mode looks horribly wrong. When I try building the app using Xcode 16, it looks as expected, but with Xcode 26, it looks like the shot. I haven't seen anything listed as a bug, but I'd appreciate any suggestions. Thanks.